struct _ACTIVATION_CONTEXT_STACK// Size=0x28
{
    struct _RTL_ACTIVATION_CONTEXT_STACK_FRAME * ActiveFrame;// Offset=0x0 Size=0x8
    struct _LIST_ENTRY FrameListCache;// Offset=0x8 Size=0x10
    unsigned long Flags;// Offset=0x18 Size=0x4
    unsigned long NextCookieSequenceNumber;// Offset=0x1c Size=0x4
    unsigned long StackId;// Offset=0x20 Size=0x4
};